Not entirely true. I have one, got it in my home country, cost $200, and I had to provide photo and flight itinerary to Thailand. No other documentation required.

A METV is good for six months, you can come and go as you please and stay 60 days each time.

Yes, visa expired Nov 6. Unless you have reentry permit for stamp expiring Nov 22, you are out of luck.

This example is also stamped "USED" which invalidates it for future use.

Depends on exactly what you have. If you have a multi-entry visa that hasn't expired, you're good. If you have an extension to stay stamp without a re-entry permit you're out of luck.

Hotel will file TM.30 when you check in, not your responsibility. You could do it as well, but you would likely need a letter from the hotel saying you're staying there.

I've heard they're clamping down on this, only 2 30day stamps per calendar year via land, not sure if they apply by air too.

I overstayed by 4 hours a couple years ago, they didn't put an overstay stamp, a different kind of stamp noting the overstay, but approving it, no fine either. They let me off the hook basically. Every time I enter, the immigration officials look at, but it's never been an issue.

However after saying that, I wouldn't recommend it, you're likely going to cause yourself unnecessary grief.

If you never plan on coming back, you could chance it and hope you don't get arrested.

You're best off going to immigration and explaining the issue, they should provide you a legal solution. Worst case 1900฿ might be money well spent.